Fault Phenomenon: SANY aerial work platform when the boom extends/retracts, the work platform tilts, auto-leveling function fails.

Troubleshooting Process:
– Checked leveling cylinder: no leakage.
– Checked tilt sensor: sensor data jumps.
– Checked leveling valve block: spool stuck.
– Replaced tilt sensor and cleaned valve block.

Root Cause: The platform tilt sensor signal was distorted, causing the control system to incorrectly drive the leveling cylinder.

Required Parts: Tilt sensor.